If Android dominated in 2012, it would look as though investors could grow skittish for Apple and Blackberry. Investors are already turning sour on shares of Apple. For the one-year period, Apple shares are down around 8%. Long time shareholders need not be worried or upset: Apple was up as much as 20,000% at its peak in 2012.

Apple’s iOS market share declined in Q4 to 20.9%, down from 23.6%. Blackberry’s share dropped from 8.8% to 3.5%, while Microsoft grew from 1.8% to 3%.

Apple’s profit margin will continue to face pressure due to the proliferation of Android devices in the market place. For smartphones, Nexus 4 constraints limited the negative pressure on Apple devices. Analysts and experts expect Apple to release another iPhone with a larger screen, TV devices, and better iPad minis. Some expectations may be realized, but it is clear that investors are looking for ways Apple could maintain its overall profit margin.

The drop in Blackberry market share is expected. The company did not release Blackberry 10, based on QNX, until January 30 2013. Microsoft was able to grow market share with its Windows Phone 8 refresh from 7.0/7.8, but Blackberry could regain lost ground.